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Web fundamentals first
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Dedicated Resource · Vanilla JS
Not every product needs React. A dedicated vanilla JS developer from Typescriptaz writes small, robust JavaScript: web components, Canvas, lightweight widgets, and the core for design systems. Fewer dependencies, better Lighthouse scores, clearer repo boundaries.
Use
Modern browsers can now handle many features that previously required a framework: Custom Elements, Shadow DOM, native dialogs, and animations via the Web Animations API. Your Vanilla JS developer leverages these platform features consistently and builds components that work in any framework — or without one.
This pays off especially for widgets on third‑party sites: chat windows, booking widgets, low‑tracking embeds. Small bundles, no global conflicts, cleanly encapsulated styles. If you need more interaction, you can achieve it with Alpine.js or extend with a framework.
For decision-makers, Vanilla JS primarily means independence: no framework updates dictating your schedule, no lock-in issues, and code based on web standards that still runs years from now. That makes maintenance predictable and costs manageable.
Typical mandates: Widgets, documentation, high-performance marketing.
Tools: Vanilla JS, CSS, Web Components, Vite
Book directly
$12,500 / month
150 hours, directly employed and dedicated solely to your backlog. At kickoff, you meet the person before work begins.
Quick explanation
Vanilla JS means JavaScript without an additional framework—the language and the browser APIs every modern browser provides. This includes Web Components, Shadow DOM, the Fetch API, the Web Animations API, and more. What used to require libraries like jQuery is often available directly in the browser today. For companies, avoiding frameworks is especially attractive where performance, independence, and long lifespan matter more than convenience—for example, with widgets and component libraries.
Expertise
Seniority isn’t shown on the resume but in code review. Our team looks for it with Vanilla JS.
01
Custom Elements, Shadow DOM, template elements, and the Fetch API are available in all modern browsers. A senior Vanilla JS developer uses them deliberately and adds libraries only where they provide real value.
02
Widgets that run on client sites must shield themselves from third‑party CSS and JavaScript. Shadow DOM, unique namespaces, and defensive programming prevent conflicts.
03
Bundle budgets, lazy loading, compositor-driven animations, and frugal DOM updates: teams that work without a framework have full control—and use it to deliver measurably faster pages.
04
A widget or component library needs a clear, versioned interface. An experienced developer documents attributes, events, and methods so other teams can use them without questions.
05
Even without a framework, components must be keyboard‑operable and understandable to screen readers. A senior implements ARIA patterns correctly and tests them with real assistive technologies.
06
Vite, tree shaking, modern output formats, and a clean CDN setup ensure components load quickly and are easy to integrate.
Typical situations
01
It must neither add load time nor conflict with external CSS. We build it small, encapsulated, and robust.
02
React here, Vue there, a CMS alongside? Web Components provide building blocks that work everywhere.
03
Landing pages, campaigns, documentation: Without framework overhead, you can achieve Lighthouse scores that are otherwise hard to maintain.
Risk under control
Without a framework, part of the built-in guardrails is missing. We deliberately mitigate these three risks:
If you build everything yourself, you also build the bugs yourself. We rely on web standards, test in all target browsers and use proven, small libraries where building in-house offers no advantage.
A widget that breaks a customer's site damages your reputation. We encapsulate styles and scripts rigorously, test in different environments, and deliver versioned releases with a clear rollback.
Without framework conventions, the structure must be explicitly documented. We record architecture, component APIs, and the build process in writing so your team can take over at any time.
Modern browsers also differ in the details. We define a test matrix based on your users’ browsers, run automated tests, and apply polyfills only where truly necessary.
Transparency
Business case
Vanilla JS pays off through lower ongoing costs. Without a framework, you avoid regular framework upgrades, and web‑standard components often run for years without changes. Smaller bundles improve load times—on your own sites and on your partners' sites. And framework‑agnostic building blocks can be used across products regardless of stack. That creates independence that pays off with every new platform.
The first two weeks
Analysis, first delivery, clear plan. Read about how we work in general at How we work.
01
How large can the bundle be, and which browsers must be supported? We define measurable goals.
02
The first web component or widget goes into review with tests and documentation.
03
You receive a roadmap for additional modules, versioning, and delivery.
After kickoff
How a typical engagement develops after the first two weeks—aligned with your backlog.
01
Bundle budget, test matrix, and the first web component or widget as a pilot.
02
More components will follow, releases will be versioned, and automated tests will run in all target browsers.
03
Documented APIs, demo pages, and a release process that allows partners and product teams to use components independently.
Example scenario
A leisure provider wants to embed its booking on hundreds of partner sites. The previous iframe solution is slow and hard to adapt to the host sites. A dedicated Vanilla JS developer builds a slim widget as a web component.
The widget loads only what it needs, adapts to partners’ designs via attributes, and doesn't interfere with external styles. New versions are rolled out in a controlled way, and partners integrate the widget without their own development effort.
For the provider, this creates a sales channel that scales with minimal support effort, because the widget runs reliably and can be integrated without outside help.
Collaboration
Individual widgets or components work well as a bounded effort with an hour bundle. If you maintain an entire component library or multiple widgets continuously, a person on the monthly plan is more appropriate.
With the discovery package, you get an initial component — so you see early how the collaboration works.
All rates, pools, and effective prices are detailed in the Pricing table.
Straight talk
For large, highly interactive applications with lots of state, vanilla JS is rarely the most economical choice. Frameworks provide structures you would otherwise have to build and maintain yourself. We recommend avoiding frameworks for widgets, component libraries, and pages where performance and independence are top priorities—and we'll tell you openly when a framework is the better fit.
For IT decision-makers
Can the person encapsulate Web Components cleanly with Shadow DOM?
How do you make sure a widget doesn't slow down third‑party pages?
Which browsers does she test and how?
How do you version and document public interfaces?
Can they justify when a framework is the better choice?
Glossary
Custom HTML elements that can be used like native tags.
Encapsulated area of a component that separates styles and markup from the rest of the page.
A browser interface for efficiently controlling animations via script.
Fixed cap on delivered code size.
Frequently asked questions
Yes, for complex applications, often not for widgets, components, and lean pages. Modern browser APIs take a lot of work off your plate—and they save you from framework updates.
Yes. Custom Elements can be used in any framework. React has full support since version 19, including properties and events.
As a small, versioned script with an encapsulated Shadow DOM, predictable loading behavior, and a clear configuration API. That makes integration possible without affecting the host page.
Content in the Light DOM is readable by search engines. For important content, we recommend avoiding exclusive rendering in the Shadow DOM—or ensure it’s prepared server‑side.
Via versioned files or packages with a clear versioning strategy. Partners can pin a fixed version or receive automatically compatible updates—both with a documented changelog.
Yes—for example with framework‑agnostic components, performance optimizations, or tooling. For deep framework work we recommend dedicated specialization.
As small as possible. For many widgets, budgets under 20 kB compressed are realistic. We set the budget together and automatically check it on every build.
Yes—for example via CSS custom properties and ::part. Components adapt to your design without foreign styles leaking in.
With unit tests for logic, component tests in a real browser, and end-to-end tests for integration on example pages.
Because they're based on web standards, they often last many years. Browsers remain backward compatible, and there are no framework updates that force changes. Maintenance is needed mainly for new requirements.
Yes. We rebuild them as Web Components, verify behavior with tests, and replace them step by step. This removes old dependencies without users noticing.
Yes—because the foundation is standard JavaScript that every frontend developer knows. With good documentation and clear conventions, teams without specialist knowledge can maintain the components.
Bottom line
A dedicated Vanilla JS developer builds components and widgets that are small, robust, and independent of framework cycles. You gain performance, reduce dependencies, and get building blocks that work across all your products—today and in years to come.
Next step
Tell us the stack, scope, and start window. We usually respond within one business day—with a specific person instead of a stack of profiles.
Quick contact
TypeScript resources from Austria and Germany, permanently employed with us. Tell us the stack, scope, and desired start date. We typically respond the same business day — with availability, appropriate seniority, and a concrete start window.
US & European billing
Choose the contracting entity that fits your procurement process. Engagements can be contracted and invoiced through our European locations or through Anexia Inc.152 W. 57th Street, 7th Floor, New York, NY 10019, USA. Talk to us about billing.